Automatic electromagnetic time-switch.



' Nu. 689,!28. Patented Dec. l7, 190i. J. SACHS."

' AUTOMATIG ELECTROMAGNETIC TIMESWITGH.

A 'ncazinn flled Sept. 21, 1900.

(No mam WiT[\JE55E5 NVENTUE ATTY-E THE NORRIS PETERS cov. PHOTO-LITHQ,WASNINOTON, 04 c.

. o by the spring I) through the ratchet c, acted arms g 9'.

UNITED, STATES FFICE.

' ATENT JOSEPH sAoHs, or HARTFORD, oonnnoricur.

SPECIFICATION forming part of Letters Patent No. 689,128, dated December17, 1901.

Application filed eptember 27, 1900. Serial No 31,239. (No model.)

To all whom it may concern:

Be it known that I, J OSEPH SAcHs, residing atHartford, in'the county ofHartford and State of Connecticut, haveinvented a new and usefulImprovement in Automatic Electromagnetic Time-Switches, of which thefollowing is a specification.

The object of my invention is to provide a means whereby electriclights, motors, or other translating devices can be automaticallyconnected or disconnected from the source of current-supply atpredetermined in-- tervals. Such devices are known as automatictime-switches and in the past. have consisted of clockworks which werearranged to release at certain time intervals another clockwork orspring motor mechanism which operated the circuit 1 controllingswitches. Aside from the disadvantage due to the necessity for regularwinding the many deficiencies of a spring clock mechanism of the sizenecessary for the operation of large switches are obvious.

In my invention I eliminate the necessity for manual winding and alsoprovide-means for the operation of the switches which are free of thedisadvantage of springs. I accom plish this result by means of a properelectromagnet or motor which is connected in circuit at the desiredintervals, and when so connected and, energized it operates thecircuitcontrolling switch and at the same time effects the winding orother operation neces g sary to work the timing device or clockmechanism. While various arrangements of the necessary elements may bemade, I have shown one in the drawing which embodies the elements of myinvention.

In the drawing I have represented my invention by a diagrammatic view.

' a represents'a small clock which is wound upon by the pawl d. One ofthe spindles in thetrain ofthis clock has a contacharm e attached and soregulated that this arm makes one complete revolution every twenty-fourhours. This contact arm e coacts with the contacts ff, which by means ofsuitable setscrews can be located in difi erent positions in the circleof the travel of the arm 6. This is accomplished by shifting them on thecurved .to regulate the time consumed by the arm 6 in moving from thecontactfto the contactf.

h h are the spools of an electromagnet, having double windings and armsn and rt, that are of iron and that are part of the magnetic circuit ofthe magnet. The two'iron coresm m of the magnet are connected togetherby the brass rod 0, so that they move as one; but when one is pulledinto its coil the other is consequently pushed out, and, vice versa. Thelower core in has a cross-arm 19 attached. One end of this cross-arm isconnected by a suitable link to the operating-leverr of the switch 7',which is of the well-known knifeblade type. This switch is mounted on aninsulating-base tand fastened to the iron arm n. The blade of the movingswitch swings on the pivot r and is a part of the lever r, so that amovement'of thelever correspondingly causes a movement of theswitch-blade in or out of its contact r on the base 25. The other end ofthe cross-arm 19 has pivotally c011- nected to it the pawl d. One end ofthis pawl engages with the ratchet 0, so that a downward movement ofthepawl causes the spring to be wound up, and I prefer to gear up fromthe spring-spindle to the ratchet, so that a slight movement of theratchet causes quite a large movement of the spring-spindle.

' Various other arrangements for winding the spring may be employed andactuated by the reciprocating movement of the core m.

The tooth of the pawl d is kept tightly against the ratchet by thespring (Z pulling on the other end. lhe windings of the magnet areconnected, respectively, to the curved sectors g and g, so that when themovingarm 6 comes in contact with either of the contacts for f theconnections are such that one of the armatu re-eoils is connected acrossthe circuit composed of the wires 8 and s, which come from the source ofsupply and feed the lamps o with the current. The wire 3, however,passes to the switch r, and the circuit is therefore controlled by itsaction.

8 and s are binding-posts.

It will be noticed that the current passing through the coil of thespool It causes an upward movement of the cores m and m and an openingof the switch r through the arm 0", while a current passing through thespool h By this arrangement it is possible causes a downward movement ofthe cores and a closing of the switch and also a rotation of thespring-winding ratchet.

The operation of the complete device is now as follows: The arm a haspassed the contact f and by closing the circuit of the spool 70 closesthe switch and moves theratchet. After thus leaving the current on thecircuitfor a definite time the arm 6 is about to come in connection withthe contact f. When this connection is made in the course of the armsmovement, the spool h will be energized and the core m drawn up, causingthe motion to be transmitted through the arm 0 to the switch and openingit. At the. same time the pawl (Z will be raised and placed in a newposition on the ratchet, so that the next downward movement rotates theratchet. In this way it. will be seen that the switch 1* is opened andclosed at predetermined intervals, and the timing-clock is wound by thesame energy that causes a motion of the switch.

Various modifications are possible in the arrangement of the magnets,the connection to the switch and its construction, the winding device,and the contact-arm e and contacts f and 1. My invention is not limitedto the detail construction of anyofthese parts,

' but broadly covers the electromagnetic operation of acircuit-controller at predetermined intervals controlled by a suitableclock or other timing device, which is energized by the same energy,causing an operation of the circuit-controller.

I claim as my invention- 1. In an automatic electric-circuit controller,the combination with an electromagnetic mechanism, of a time mechanism,contact devices, electrical circuits between said contact devices andthe electromagnetic mechanism, means actuated by said time mechanism toautomatically operate the said circuits to the electromagneticmechanism, an external electric circuit independent of the said circuitsto the magnets, means actuated by said electromagnetic mechanism tosimultaneously operate the said external circuit and wind the said timemechanism, substantially as set forth.

2. In an automatic electric-circuit controller, the combination with anelectromagnetic mechanism, of a time mechanism, contact devices,electrical circuits between said contact devices and the electromagneticmechanism, means actuated by said time mechanism to automaticallyoperate the said circuits to the electromagnetic mechanism, an externalelectric circuit independent of the said circuits to the magnets, aswitch in said external circuit, means actuated by the electromagneticmechanism to operate said switchand means also and simultaneouslyactuated by said electromagnetic mechanism to Wind the said timemechanism, substantially as set forth.

3. In an automatic electric-circuit controller, the combination with anelectromagnetic mechanism, of a time mechanism, contact de- .and meansactuated by the said electromagnetic mechanism to wind the said timemechanism simultaneously with the operation of said switch,substantially as set forth.

4. In an automatic electric-circuit controller, the combination with anelectromagnetic mechanism, of a time mechanism, contact devices,electrical circuits between said contact devices and the electromagneticmechanism, means actuated by said time mechanism to automaticallyoperate the said circuits to the electromagnetic mechanism, an externalelectric circuit independent of the said circuits to the magnets, abar-switch with an end extension, andoperated by the saidelectromagnetic mechanism, an arm connected to an end of the cores ofsaid mechanism, a link connecting the said arm and the said extension ofthe bar-switch whereby the switch is operated by the saidelectromagnetic mechanism, and paWLand-ratchet devices connected to thesaid arm and time mechanism respectively whereby the said time mechanismis wound simultaneously with the operation of said switch, substantiallyas set forth.

5. In an automatic electric-circuit controller, the combination with twoelectromagnets, of a time mechanism, contact devices, electricalcircuits between said contact devices and the two electromagnets, meansactuated by said time mechanism to automatically operate the saidcircuits to the two electromagnets, an external electric circuitindependent of the said circuits to the magnets, a barswitch with an endextension and operated by the said two electromagnets, an arm connectedto an end of the cores of said two electromagnets, a link connecting thesaid arm and the said extension of the bar switch whereby the switch isoperated by the said two electromagnets, and pawl-and-ratchet devicesconnected to the said arm and time mechanism respectively whereby thesaid time mechanism is wound simultaneously with the operation of saidswitch, substantially as set forth.

Signed by me this 25th day of September, 1900.

JOSEPH SACHS.

Witnessesz.

GEO. T. PINCKNEY, BERTHA M. ALLEN.

ITO

